Merge tag 'pull-tcg-plugin-memory-190924-1' of https://gitlab.com/stsquad/qemu into staging

TCG plugin memory instrumentation updates

  - deprecate plugins on 32 bit hosts
  - deprecate plugins with TCI
  - extend memory API to save value
  - add check-tcg tests to exercise new memory API
  - fix timer deadlock with non-changing timer
  - add basic block vector plugin to contrib
  - add cflow plugin to contrib
  - extend syscall plugin to dump write memory
  - validate ips plugin arguments meet minimum slice value

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* tag 'pull-tcg-plugin-memory-190924-1' of https://gitlab.com/stsquad/qemu:
  contrib/plugins: avoid hanging program
  plugins: add option to dump write argument to syscall plugin
  plugins: add plugin API to read guest memory
  contrib/plugins: Add a plugin to generate basic block vectors
  util/timer: avoid deadlock when shutting down
  tests/tcg: add a system test to check memory instrumentation
  tests/tcg: ensure s390x-softmmu output redirected
  tests/tcg: only read/write 64 bit words on 64 bit systems
  tests/tcg: clean up output of memory system test
  tests/tcg/multiarch: add test for plugin memory access
  tests/tcg/plugins/mem: add option to print memory accesses
  tests/tcg: allow to check output of plugins
  tests/tcg: add mechanism to run specific tests with plugins
  plugins: extend API to get latest memory value accessed
  plugins: save value during memory accesses
  contrib/plugins: control flow plugin
  deprecation: don't enable TCG plugins by default with TCI
  deprecation: don't enable TCG plugins by default on 32 bit hosts

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 1c9c775df6..04e9ad4996 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -350,6 +350,8 @@ typedef union IcountDecr {
  *                         from CPUArchState, via small negative offsets.
  * @can_do_io: True if memory-mapped IO is allowed.
  * @plugin_mem_cbs: active plugin memory callbacks
+ * @plugin_mem_value_low: 64 lower bits of latest accessed mem value.
+ * @plugin_mem_value_high: 64 higher bits of latest accessed mem value.
  */
 typedef struct CPUNegativeOffsetState {
     CPUTLB tlb;
@@ -358,6 +360,8 @@ typedef struct CPUNegativeOffsetState {
      * The callback pointer are accessed via TCG (see gen_empty_mem_helper).
      */
     GArray *plugin_mem_cbs;
+    uint64_t plugin_mem_value_low;
+    uint64_t plugin_mem_value_high;
 #endif
     IcountDecr icount_decr;
     bool can_do_io;